1) Set phrase: any bauble of folly will keep baby jolly (let him do whatever (silly) things he wants to do), any toy is O.K. that keeps (the) baby at play, play keeps (the) baby from tears, anything to keep someone quiet
2) Saying: any toy is o.k. that keeps the baby at play
Универсальный русско-английский словарь. Академик.ру. 2011.